ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2018
Pseudo-patella baja: a minor yet frequent complication of total knee arthroplasty.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed.
- Differences in joint line level and posterior condylar offset during total knee replacement with use of gap-balancing and measured resection techniques-matched cohort study.BMC musculoskeletal disorders · 2023Trial
- Clinical Study and Finite Element Analysis on the Effects of Pseudo-Patella Baja After TKA.Orthopaedic surgery · 2025Article
- Different Radiological Indices of Patellar Height Predict Patients' Diverse Outcomes Following Total Knee Arthroplasty.Clinics in orthopedic surgery · 2024Article
- Incidence of patella baja and pseudopatella baja in aseptic revision total knee arthroplasty.Archives of orthopaedic and trauma surgery · 2024Article
- A new and simple method for patellar height measurement: Fibula-condyle-patella angle.Joint diseases and related surgery · 2024Article
- Influence of Changes in Patella Indices on Total Knee Replacement Surgery Outcomes.Orthopedic reviews · 2024Article
- Infection and Instability Increasing the Risk of Patella Baja and Pseudo-Patella Baja after Revision Total Knee Arthroplasty.Clinics in orthopedic surgery · 2023Article
- The Variation of the Patellar Height in Total Knee Arthroplasties and its Relationship with the Replacement or not of the Patella.Revista brasileira de ortopedia · 2023Article
- Tibial tubercle-Roman arch (TT-RA) distance is superior to tibial tubercle-trochlear groove (TT-TG) distance when evaluating coronal malalignment in patients with knee osteoarthritis.European radiology · 2022Article
- Surgical Treatment of Iatrogenic Patella Baja.Current reviews in musculoskeletal medicine · 2022Review
- How much preoperative flexion contracture is a predictor for residual flexion contracture after total knee arthroplasty in hemophilic arthropathy and rheumatoid arthritis?Knee surgery & related research · 2022Article
- 3D-printed patient-specific instrumentation decreases the variability of patellar height in total knee arthroplasty.Frontiers in surgery · 2022Article
- Accuracy of joint line restoration based on three-dimensional registration of the contralateral tibial tuberosity and the fibular tip.Journal of experimental orthopaedics · 2021Article
- Reliability of a Caton-Deschamps-derived patella height index for knee arthroplasty.International orthopaedics · 2021Article
- Importance of the gender and preoperative knee sagittal alignment to avoid unnecessary tibial resection in TKR.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2021Article
- Blackburne-Peel ratio predicts patients' outcomes after total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2019Article
- Patella-height analysis and correlation with clinical outcome after primary total knee arthroplasty.Journal of orthopaedicsArticle
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9 authors.
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Abstract
purposeOne of the complications in total knee arthroplasty (TKA) is pseudo-patella baja (PPB). PPB is present when there is no shortening of the patellar tendon, but the joint line is elevated. The purpose of this study is to investigate the incidence of PPB after TKA and its clinical effects.
methodsA case series of 158 patients undergoing TKA surgery between 1999 and 2012 at the 2nd Department of Orthopaedics and Traumatology, Pisa were retrospectively reviewed. Surgeries were performed by three senior surgeons, using the same surgical procedure for the implantation of a cemented posterior stabilized prosthesis. Lateral radiographs at 30° knee flexion were evaluated and the presence of PPB defined as modified Blackburne-Peel Index (mBPI) of < 0.54. All the patients were clinically evaluated using the Knee Society Score (KSS) and the Western Ontario and McMaster Universities Osteoarthritis Index score (WOMAC). Anterior knee pain was evaluated by visual analogue scale (VAS) and range of motion (ROM) was assessed through clinical examination.
resultsThe cohort group consisted of 158 patients, 109 (69.0%) female and 49 (31.0%) male. Median age at time of surgery was 74 years (range 36-87) and median follow-up was 66 months (range 12-163 months). Bilateral TKA surgery was performed in 50 patients, resulting in a total of 208 implants for investigation. On radiological evaluation, 139 (66.8%) showed no abnormalities (no joint line elevation and no patellar tendon shortening) and 55 (26.4%) presented joint line elevation with absence of patellar tendon shortening (PPB). No significant differences were found between the groups in terms of the KSS, WOMAC score, VAS or ROM.
conclusionPost TKA PPB is a relatively common complication. Careful preoperative planning, adequate soft tissue release, optimal cutting of bone components, on the femoral side in particular, and the use of thin polyethylene inserts can help to avoid this complication. LEVEL OF EVIDENCE: IV.
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